Golf Ball Core Cover Blend Resiliency Durability
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Solution Overview
Problem
Current golf ball compositions fail to achieve a balance of high resiliency, durability, scuff-resistance, and a soft feel, which are essential for improved playing performance and user experience.
Innovation Solution
A golf ball composition comprising a core, intermediate layer, and cover made from a rubber blend of cycloalkene rubber, ionomeric resin, and polyamide, with specific weight percentages and properties that provide a positive hardness gradient and enhanced rebounding properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional ionomer or polyamide materials are used in golf ball layers, then durability and scuff-resistance are improved, but resiliency and soft feel deteriorate
Solution Approach 1:
The patent employs a composite material system consisting of three distinct layers: an inner core layer made of polybutadiene rubber for high resiliency, an intermediate layer made of ionomer resin for durability and scuff-resistance, and an outer cover layer made of polyamide for toughness. This multi-layer composite structure allows each material to contribute its superior properties without compromising the overall performance, resolving the contradiction between durability and resiliency.
2Reliability
If harder materials are used in the intermediate layer to improve scuff-resistance, then durability is improved, but the soft feel deteriorates
Solution Approach 1:
The patent applies the local quality principle by assigning different material properties to different layers of the golf ball. The intermediate layer is specifically engineered with ionomer resin that has controlled neutralization levels (50-90%) to achieve optimal balance between scuff-resistance and soft feel. The outer cover layer uses polyamide for enhanced toughness while the inner core maintains softness through polybutadiene composition. This localized optimization of material properties at each layer resolves the contradiction between scuff-resistance and soft feel.
Data Source
AI summary
Multi-piece golf balls containing a core of at least one layer and cover of at least one layer are provided. At least one component is formed from a rubber composition comprising: i) about 10 to about 65 weight percent of a cycloalkene rubber having a trans-content of about 55% or greater and a melting point of 30° C. or greater; ii) about 30 to about 80 weight percent of an ionomeric resin; and 3) about 5 to about 40 weight percent of a polyamide. The rubber composition may further include other thermoplastic and thermosetting materials such as, for example, polybutadiene, polyisoprene, ethylene propylene rubber, ethylene propylene diene rubber, and styrene-butadiene rubber. The rubber composition helps improve resiliency, durability, scuff-resistance, and feel of the ball.